研究报告
邵琳琳,张立秋,封莉.活化温度对竹柳基活性炭性能及其制备过程中副产物组成的影响[J].环境科学学报,2014,34(10):2477-2483
活化温度对竹柳基活性炭性能及其制备过程中副产物组成的影响
- Effect of activation temperature on the characteristics of WAC and by-products from the pyrolysis of willow bamboo
- 基金项目：环保公益性行业科研专项(No.201109041,201209048);国家自然科学基金项目(No.51178046)
- 作者
- 单位
- 邵琳琳
- 北京林业大学环境科学与工程学院,北京市水体污染源控制技术重点实验室,北京 100083
- 张立秋
- 北京林业大学环境科学与工程学院,北京市水体污染源控制技术重点实验室,北京 100083
- 封莉
- 北京林业大学环境科学与工程学院,北京市水体污染源控制技术重点实验室,北京 100083
- 摘要：以一种常见的环境修复材料竹柳为原料来制备竹柳基活性炭(WAC),考察了不同活化温度(400、450、500、550、600 ℃和650 ℃)对WAC性质及其除污染性能的影响,同时评估了制备过程中气态和液态副产物的生成规律与利用潜能.结果表明,随着活化温度的升高,WAC产率下降,热解油产率上升,而热解气产率相对稳定.六组WAC均具有较高的比表面积(BET),最高可达1526 m2·g-1,但BET值随活化温度的升高呈下降趋势;WAC的碘吸附值和亚甲基蓝吸附值最高可达1122.25 mg·g-1和415.50 mg·g-1,对重金属Pb2+和硝基苯的最大吸附量分别为9.20 mg·g-1和4.21 mmol·g-1.WAC制备过程中热解气主要组分为H2、CH4、CO和CO2,随活化温度升高,H2和CH 4含量上升,CO2含量下降,热解气的总燃烧热值升高.热解油的组分较为复杂,杂环类、烷烃类、烯烃类和有机酸类有机物含量较高,且随活化温度变化明显,在活化温度为650 ℃时,热解油的燃烧热最大.
- Abstract：In the present work,willow bamboo based activated carbon(WAC)was prepared from a common phytoremediation materials-willow bamboo.The physic-al and chemical properties of WACs prepared at different activation temperatures(400 ℃,450 ℃,500 ℃,550 ℃,600℃and 650℃)and their abili-ties to remove pollutants were examined.In the meantime,the compositions and utilization potential of the pyrolysis gases and oils generated during the preparation of WACs were investigated.The results indicated that,with the increase in activation temperature,the yields of WAC decreased,the yield of pyrolysis oils increased,while the yield of pyrolysis gases kept relatively stable.The specific surface areas of the prepared six WACs were all very high,with the highest value of 1526 m2·g-1.Increasing the activation temperatures gradually decreased its specific surface area.The adsorption capacity for iodine,methylene blue,Pb2+,and nitrobenzene of WACs was 1122.25,415.50,9.20 mg·g-1,and 4.21 mmol·g-1,respectively.The primary components of pyrolysis gases were H2 ,CH4,CO,and CO2.High activation temperature was in favour of the production of H2 and CH4, with the amount of CO2 reduced and the total combustion heat of pyrolysis gases improved.The components of pyrolysis oils were very complex,mainly containing heterocyclic,alkanes,alkenes,and organic acids,etc.The components of pyrolysis oils were significantly influ-enced by activation temperature,and the maximum combustion heat was obtained at the activation temperature of 650 ℃.
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